This site quotes the Wedding Fee as £60.50, with use of the church costing between £150 to £250:
http://www.islayinfo....-marriage-venues.html
However, that's on Islay. Other sites I've looked at suggest around £300 for the use of the church (with up to £700 being charged for certain popular venues).
Down here in Suffolk, someone has recently mentioned to me (during the past week), that they're paying £300 for the use of the church, plus the vicar's fee (which I'm not sure of), plus extra for the choir and yet more for the organist.
Chris